What is CVE-2026-82476?

CVE-2026-82476 is a medium-severity vulnerability in Usememos Memos, classified under Server-Side Request Forgery (SSRF). CVSS score: 5.3/10. Published 2026-08-29.

How severe is CVE-2026-82476?

Medium severity. CVSS v3 base score is 5.3 out of 10.

SSRF in Usememos Memos

CVE-2026-82476

Memos through 0.30.0 omits the 100.64.0.0/10 carrier-grade NAT address range from SSRF protection in its link-metadata fetcher, allowing unauthenticated attackers to bypass IP validation. Attackers can make the server request internal hosts in that range including cloud metadata services and read page titles and descriptions back.

Vulnerability class: SSRF (Server-Side Request Forgery)

Published 2026-08-29 · last modified 2026-09-10.

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N.

EPSS exploit prediction

EPSS: 0.004 (35.2th percentile), scored 2026-10-14.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 35th percentile — 35.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.003 · newest: 0.004 · change: +0.002

Affected products

Usememos Memos

Weakness classification (CWE)

CWE-918 — Server-Side Request Forgery (SSRF)

References

github.com/usememos/memos/issues/6099 (issue-tracking)
github.com/usememos/memos/blob/v0.30.0/internal/httpgetter/html_meta.go (technical-description)
github.com/usememos/memos (product)
www.vulncheck.com/advisories/memos-through-0.30.0-ssrf-via-omitted-cgnat-addres… (third-party-advisory)

Frequently asked questions

What is CVE-2026-82476?: CVE-2026-82476 is a medium-severity vulnerability in Usememos Memos, classified under Server-Side Request Forgery (SSRF). CVSS score: 5.3/10. Published 2026-08-29.
How severe is CVE-2026-82476?: Medium severity. CVSS v3 base score is 5.3 out of 10.